fenv.c revision 4394
14394Ssaidi@eecs.umich.edu/* 24394Ssaidi@eecs.umich.edu * Copyright (c) 2007 The Regents of The University of Michigan 34394Ssaidi@eecs.umich.edu * All rights reserved. 44394Ssaidi@eecs.umich.edu * 54394Ssaidi@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 64394Ssaidi@eecs.umich.edu * modification, are permitted provided that the following conditions are 74394Ssaidi@eecs.umich.edu * met: redistributions of source code must retain the above copyright 84394Ssaidi@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 94394Ssaidi@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 104394Ssaidi@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 114394Ssaidi@eecs.umich.edu * documentation and/or other materials provided with the distribution; 124394Ssaidi@eecs.umich.edu * neither the name of the copyright holders nor the names of its 134394Ssaidi@eecs.umich.edu * contributors may be used to endorse or promote products derived from 144394Ssaidi@eecs.umich.edu * this software without specific prior written permission. 154394Ssaidi@eecs.umich.edu * 164394Ssaidi@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 174394Ssaidi@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 184394Ssaidi@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 194394Ssaidi@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 204394Ssaidi@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 214394Ssaidi@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 224394Ssaidi@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 234394Ssaidi@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 244394Ssaidi@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 254394Ssaidi@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 264394Ssaidi@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 274394Ssaidi@eecs.umich.edu * 284394Ssaidi@eecs.umich.edu * Authors: Ali Saidi 294394Ssaidi@eecs.umich.edu */ 304394Ssaidi@eecs.umich.edu 314394Ssaidi@eecs.umich.edu#include <assert.h> 324394Ssaidi@eecs.umich.edu#include <stdlib.h> 334394Ssaidi@eecs.umich.edu#include <fenv.h> 344394Ssaidi@eecs.umich.edu 354394Ssaidi@eecs.umich.eduvoid m5_fesetround(int rm); 364394Ssaidi@eecs.umich.eduint m5_fegetround(); 374394Ssaidi@eecs.umich.edu 384394Ssaidi@eecs.umich.edustatic const int m5_round_ops[] = {FE_DOWNWARD, FE_TONEAREST, FE_TOWARDZERO, FE_UPWARD}; 394394Ssaidi@eecs.umich.edu 404394Ssaidi@eecs.umich.eduvoid m5_fesetround(int rm) 414394Ssaidi@eecs.umich.edu{ 424394Ssaidi@eecs.umich.edu assert(rm > 0 && rm < 4); 434394Ssaidi@eecs.umich.edu fesetround(m5_round_ops[rm]); 444394Ssaidi@eecs.umich.edu} 454394Ssaidi@eecs.umich.edu 464394Ssaidi@eecs.umich.eduint m5_fegetround() 474394Ssaidi@eecs.umich.edu{ 484394Ssaidi@eecs.umich.edu int x; 494394Ssaidi@eecs.umich.edu int rm = fegetround(); 504394Ssaidi@eecs.umich.edu for(x = 0; x < 4; x++) 514394Ssaidi@eecs.umich.edu if (m5_round_ops[x] == rm) 524394Ssaidi@eecs.umich.edu return x; 534394Ssaidi@eecs.umich.edu abort(); 544394Ssaidi@eecs.umich.edu return 0; 554394Ssaidi@eecs.umich.edu} 564394Ssaidi@eecs.umich.edu 57